I bought this thinking it would be good for a spare bag on trips but I think the next larger size might be better. But this probably could do as an emergency overflow bag even though it seems to be an odd size.
I have it now in my car holding all the gear like a towel, flashlight, bungee cords, and a mapsco. I think I could also fit jumpers in there if I wanted. It's a nice way to organize everything so I can easily find it or move it around if I need space.
As with all the Red Oxx products I own it's very rugged and tough. I could see this or the mesh version being a very good bag for the gym clothes, but I use my Sunchaser for that. I think it's a great value for the price and the quality you get.